00:01
Okay, so let's begin by graphing our system.
00:08
So we've got 2x plus y less than or equal to 30.
00:11
So i want to calculate my x -intercept.
00:16
I set y equal to zero, 2x equals 30.
00:20
So that must make x equal to 15.
00:26
Now i can do the same thing for my y -intercept.
00:29
Set x equal to zero, y comes out to 30.
00:33
And so this is that line.
00:44
2y less than or equal to 16 simplifies into y is less than or equal to eight.
00:53
So i've got a horizontal line here at eight.
00:57
And then i've got the x and y are both greater than zero.
01:01
So we know we're in the first quadrant, which is the only part of this graph that's being shown.
01:05
So if i shade in my red region, because it's a less than, i want the area under...